Keyhole-illuminating apparatus.



P. R. HARSH.

KEYHOLE ILLUMINATING APPARATUS.

APPLICATION FILED JUNE H, 1915- Patented July 18, 1916.

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I KEYHOLE IL'LUMINATING APPARATUS.

APPLICATION FILED JUNE H, 1915.

Smowntoa PR. Harsh,

Elm/1m PAUL R. HARSH, or TOLEDO, 01110.

KEYHOLE-ILLUMINATING APPARATUS.

Specification of Letters Patent.

Patented July 18, 1916.

Application filed June 11, 1915. Serial No. 33,551.

T 0 all whom it may concern:

Be it known that I, PAUL R. HARSI-I, a citizen of the United States ofAmerica, residing at Toledo, in the county of Lucas and State of Ohio,have invented new and useful Improvements in Keyhole-IlluminatingApparatus, of which the following is a switch when the door is is'openposition,

thereby preventing waste of current in the repeated operation of theswitch.

It is also my purpose to provide apparatus of the class described whichwill embrace the desired features .of sim licity, ciliciency anddurability, which may be installed and maintained at small cost whichwill operate efliciently and effectively for its intended purpose andwherein the component parts will be so arranged and correlated as toreduce the possibility of derangement to a minimum.

A further object of my invention is the profision of a keyholeilluminating apparatus which may be used in connection with the doorbell and burglar alarm apparatus so that the door bell may be operatedindependently of the illuminating apparatus, when the burglar alarm willbe put in operation in the event of a person endeavoring to effect anunlawful entrance into th house.

is a fragmentary front elevation of a door equipped with keyholeilluminating apparatus constructed in accordance with the presentinvention. Fig. 9 is a fragmentary horizontal sectional view through thedoor and door jamb showing the relative positions of the keyhole andlamp. Fig. 3 is an enlarged front elevation of the door showing thevarious circuit connections,

parts being broken away and other parts shown in section. Fig. l is asimilar View showing a modified form of the invention. F g. 5 is asectional view' on the line 55 of Fig. 4. Fig. Gis a diagrammatic viewshowing the various circuit connections. F 1g. 7 is a fragmentary edgeview of one of the side stiles of the door frame. Fig. 8 is afragmentary longitudinal sectional view through the door knob andescutcheon plate, parts being shown in elevation.

Referring now to the drawings in detail, 1 designates a door jamb and 2the door hinged at one edge to one stile of the jamb and capable ofswinging movement to open and closed positions. The inner surface of theremaining side stile of the door jamb, at a point adjacent to the centerthereof, is formed with arecess and secured to the inner surface of suchside stile at the recess the door may be locked in closed position.Secured to the opposite sides of the door and formed with keyholesalining with each other and with .the keyhole in the casing of the lock6 are escutcheon plates 7 while formed in the escutcheon plates abovethe keyholes therein are circular openings alining with each other and.with the opening in the barrel controlling the latching bolt The sideedge of and passed through these alining openings I is a shank 8 havingthe opposite ends thereof equipped with knobs 9 respectively whereby thebarrel may be rotated to retract the latching bolt.

Formed in the side stile of the door jamh adjacent to the plate 3 anddisposed in proximity to the keyhole of the lock is a recess 10 anddisposed within the recess 10 is an electric lamp receptacle 11 securedwithin the recess by means of a plate 12'fastened to the side stile ofthe jamb and formed with an opening concentrically of the receptacle.Passed through this openingand threaded into the recepta le is the bodyof an electrlc lamp bulb 13, while secured to the wall of 1 the openingin the plate 11 and partially surrounding the bulb 13 is a reflector 14acting to throw the light rays from the bulb toward the keyhole. Securedto the inner surface of the door jamb adjacent to the upper end thereofis a contact 15 and adapted to engage the contact 15 is a contact finger16 carried by the adjacent edge ofthe door 2 and designed to engage thecontact 15 when the door is in closed position. Leading from the contactfinger 16 is a conductor 17 terminallv connected with a binding screw 18carried by the escutcheon plate upon the outer side of the door, whileseated within a recess formed'in the outer end of the knob on the outerside of the door is a push button switch 19. One terminal of the pushbutton switch 19 is grounded upon the adjacent escutcheon plate by meansof a wire 20, while the remaining terminal of the switch 19 is connectedwith the adjacent door knob as at 21. In accordance with my presentinvention; the outer door knob and the shank 8 are insulated from theouter escutcheon plate by means of insulating bushings 22. Secured tothe rear face of the plate 3 and extending into the recess in the doorjamb behind the opening 4 is a contact plate 23' adapted to be engagedby the latching bolt of the lock 6 when the door is in closed position.Leading from the contact plate 23 is a conductor 24 terminally connectedto one side of the receptacle 11 and from the remaining side of thereceptacle 11 leads a conductor 25, while from the contact 15 leads aconductor 2-6. By means of this construction, it will be seen that whenthe conductors'25 and 26 are connected with a battery or other source ofelectrical energy.

and the door in closed position, the circuit thus formed will be openedat the push button switch and may be closed when the push buttom switchis depressed, thereby energizing the filament of the lamp bulb 13 sothat the rays of light will be projected toward the keyhole toilluminate the latter to facilitate the insertion of the key therein.When the push button switch is closed, current flows through'theestablished circuit as follows; from one side of the battery, throughthe conductor 26, the contact 15, contact finger 16, conductor 17 theescutcheon plate, the'ground wire 20, through the push button switch 19,the door knob, the shank 8 carrying the knob, the latching bolt, thecontact plate 23 engaged by such bolt, the conductor 24, the lamp, andback to the battery by way of the conductor 25. .32 designates a batteryhaving the opfiosite sides thereof connected with the terminals of theconductors 25 and 26 respectively.

34 designates a relay controlling a local burglar alarm circuit 38 andleading from one terminal of the winding of the relay 34 is a conductor33 including a suitable controlling switch 28 and terminally connectedto the conductor 26, while leading from the remaining terminal of thewinding of the relay 34 is a conductor 35 terminally connected with onecontact of a pair 36 located in the keyhole of the lock and spaced aparttherein. The remaining contact of the pair I the conductor 33, and'theclosed switch 28 therein, the relay 34, the conductor-35, the bridgedcontacts 36, and the conductor 37, back to the battery.

39 designates an electric bell and one side of the bell 39 is connectedwith the conductor 33 between the switch 28 and the battery 32 by way ofa conductor 40, while the remaining side of thebell 39 is connected withone side of a push button switch 41 located upon the outer side of thedoor j amb and the remaining terminal of the push button switch 41 isconnected with the other side of the battery by way of a conductor 42.

In the modified form of my invention illustrated in Fig. 4, I have showna form of push button detachably connected with the outer knob. In thepresent instance, the push button comprises a collar 43 of insulatingmaterial surrounding the hub of the knobv and secured thereto by meansof a set screw 44, and a curved leaf spring 45 disposed upon theperiphery of the collar 43 and having one end secured to the collar andthe remaining end portion disposed over a radial opening 46 formed inthe collar and secured to this end of the leaf spring is a stem 47having the inner end extending -"through the opening 46- and adapted tobe forced into engagement with the knob shank or spindle. The springstrip 45 is grounded 'upon the adjacent escutcheon plate so that whenthe stem 47 is depressed to engage the knob shank or spindle the circuitof the lamp will be closed, thereby energizing the lamp.

While I have herein shown and described certain preferred forms of myinvention by way of illustration, I wish it to be under- 'lamp disposedin proximity to the keyhole,

an electric circuit including said lamp, a push button switch in saidcircuit carried by the door knob on the outer side of the door wherebythe circuit may be closed to energize said lamp, door operated meansclosing said circuit at a point remote from said push button switch andadapted to open the circuit in the movement of the door to openposition, said circuit including the latching bolt of the door, and aplate carried by the door jamb in the path of movement of the latchingplate, whereby the circuit will be completed when the door is closed and15 latched.

2. In apparatus of the class described, a

lamp disposed in proximity to the keyhole of the door, an electriccircuit including said lamp, a switch in said circuit adjacent to thekeyhole whereby the circuit may be closed to energize said lamp, analarm circuit controlling relay keyhole contacts con-- nected in circuitwith said relay and adapted to be bridged by the key to energize therelay, and a bell, and a push button switch connected in series witheach other.

In testimony whereof I aflizi my signature in presence of two witnesses.

PAUL R. HARSH. Witnesses:

I J. R. WRIGHT,

R. F. STEVENSON.

